November/December 2021 crawl archive now available
The crawl archive for November/December 2021 is now available! The data was crawled Nov 26 – Dec 9 and contains 2.5 billion web pages or 280 TiB of uncompressed content. It includes page captures of 1.2 billion new URLs, not visited in any of our prior crawls.
url_host_name_reversed was added to the columnar index. It holds the host name in reverse domain name notation (
com.example.www) which is more efficient to query. In order to make use of the new column please use the updated table schema. On Amazon Athena you need to recreate table by running the latest table creation statement. Further details are found in the corresponding pull request.
The columnar index is now built using Spark version 3.2.0 and Parquet MR 1.12.1 – these upgrades allow us to go for further improvements next year. Let us know if you observe any incompatibilities using this index to query data from the Nov/Dec 2021 crawl.
The crawler is now based on Tika 2.1.0 for detection of MIME/content types and character sets used to encode HTML documents.
Archive Location and Download
The November/December crawl archive is located in the commoncrawl bucket at crawl-data/CC-MAIN-2021-49/.
To assist with exploring and using the dataset, we provide gzipped files which list all segments, WARC, WAT and WET files.
By simply adding either s3://commoncrawl/ or https://data.commoncrawl.org/ to each line, you end up with the S3 and HTTP paths respectively.
|File List||#Files||Total Size
|Non-200 responses files||CC-MAIN-2021-49/non200responses.paths.gz||64000||2.29|
|URL index files||CC-MAIN-2021-49/cc-index.paths.gz||302||0.2|
The Common Crawl URL Index for this crawl is available at: https://index.commoncrawl.org/CC-MAIN-2021-49/. Also the columnar index has been updated to contain this crawl.
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